The compositions of Fazil Say belong to the key works of Turkish music of the 21st century. The classical music of the Occident, jazz improvisations as well as elements of oriental folk music and Turkish music inspire his work. Fazil Say, who lives in Istanbul, celebrates great success all over the world with his very effective, distinctive sounds, both as a composer and as a pianist. Fazil Say writes numerous compositions for the piano duo of the twin sisters Ferhan & Ferzan Onder. In 2013 Ferhan & Ferzan Onder presented the world premiere of the composition "Winter Morning in Istanbul" in Berlin. The "Concerto for two pianos and orchestra" op. 48 was also created for them under the working title "Twins" in 2013, at a time when protests were shocking Turkey. In 2018 Fazil Say wrote for Ferhan & Ferzan Onder the "Sonata for two pianos" op. 80 for the Louis Vuitton Foundation. This composition was the missing piece in the mosaic to realize this concept album "Ferhan & Ferzan onder play Fazil Say."